I am getting an error while converting the response from JSON to Apex class.

Invalid conversion from runtime type MapAPIDemo.resourceSets to List<MapAPIDemo.resourceSets>

Here is the code below

Apex Code

public with sharing class MapAPIDemo {

    public list<resourceSets> listresourceSet{get;set;}
    public Integer statusCode{get;set;}
    public String copyright{get;set;}
    public String statusDescription{get;set;}
    public String brandLogoUri{get;set;}
    public String traceId{get;set;}
    public String authenticationResultCode{get;set;}
    public static void getPostalCodeDetails(String postalCode){
        HttpRequest request = new HttpRequest();
        String endPoint = 'http://dev.virtualearth.net/REST/v1/Locations?postalCode=';
        endPoint += postalCode;
        endPoint += '&key=';
        endPoint += SYSTEM.Label.BING_API;
        Http http = new Http();
        HttpResponse response = http.send(request);
        if(response.getStatusCode() == 200){
            System.debug('Code Results=====>'+response.getStatus());
            String responseBody = response.getBody();
            //List<MapAPIDemo.resourceSets> lstResource = (List<MapAPIDemo.resourceSets>) JSON.deserialize(response.getBody(),MapAPIDemo.resourceSets.class);






    public class resourceSets{
        public list<resources> resources{get;set;}
        public Integer estimatedTotal{get;set;}

    public class resources{
        public String entityType{get;set;}
        public String confidence{get;set;}
        public point point{get;set;}
        public address address{get;set;}
        public String name{get;set;}
        public list<geocodePoints> geocodePoints{get;set;}
        public list<String> bbox{get;set;}
        public list<String> matchCodes{get;set;}
        public String locType{get;set;}

    public class point{
        public list<String> coordinates{get;set;}
        public String type{get;set;}

    public class geocodePoints{
        public String type{get;set;}
        public String calculationMethod{get;set;}
        public list<String> usageTypes{get;set;}
        public list<String> coordinates{get;set;}

    public class address{
        public String postalCode{get;set;}
        public String countryRegion{get;set;}
        public String formattedAddress{get;set;}
        public String adminDistrict2{get;set;}
        public String locality{get;set;}
        public String adminDistrict{get;set;}

Thanks for the help,

  • 1
    Please provide the json your trying to parse
    – nchursin
    Commented Aug 2, 2020 at 13:38

1 Answer 1


From given error -

Invalid conversion from runtime type MapAPIDemo.resourceSets to List<MapAPIDemo.resourceSets>

You are not using list type in JSON.deserialize method.

Please try with this code part -

List<MapAPIDemo.resourceSets> lstResource = (List<MapAPIDemo.resourceSets>) JSON.deserialize(response.getBody(), List<MapAPIDemo.resourceSets>.class);
  • Thanks for the help. I am getting an error now System.JSONException: Malformed JSON: Expected '[' at the beginning of List/Set Commented Aug 2, 2020 at 12:16
  • 1
    @ShantanuMahajan That means your JSON isn't a list, but rather a single object.
    – sfdcfox
    Commented Aug 2, 2020 at 13:42
  • 1
    Ysr, please use please instead of pls. Some people may consider it unprofessional, and one of our core tenants is that we want to be taken as if we were professional.
    – sfdcfox
    Commented Aug 2, 2020 at 13:49
  • @sfdcfox Thank you for the feedback. I have updated the answer and I will take care in future as well. :)
    – Ysr Shk
    Commented Aug 2, 2020 at 15:43

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